Leptospiral Surface Proteins
Leptospiral Surface Proteins - Related Videos
10:47
Immuno-fluorescence Assay of Leptospiral Surface-exposed Proteins
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Cited by 23 •
2011
An efficient method to assess surface-exposure of leptospiral proteins is described. The method is specifically designed to avoid disruption of the fragile outer membrane of leptospiral cells. This technique requires employment of several negative controls to assess the integrity of the outer membrane and specificity of antibody reaction.
07:42
In-vivo Detection of Protein-protein Interactions on Micro-patterned Surfaces
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Cited by 7 •
2010
This video shows experiments with subsequent analysis of protein-protein interactions by the use of micro-patterned surfaces. The approach offers the possibility to detect protein interactions in living cells and combines high throughput capabilities with the possibility to extract quantitative information.
10:35
Surface Passivation for Single-molecule Protein Studies
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Cited by 270 •
2014
We describe a method for passivating a glass surface using polyethylene glycol (PEG). This protocol covers surface cleaning, surface functionalization, and PEG coating. We introduce a new strategy for treating the surface with PEG molecules over two rounds, which yields superior quality of passivation compared to existing methods.
04:58
Isolation of Cell-Surface and Intracellular Proteins from an Astrocyte Culture
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2025
This video demonstrates the isolation of cell-surface and intracellular proteins from an astrocyte culture. The astrocyte culture is placed on ice to inhibit endocytosis, and then the cell-surface proteins are labeled with a biotinylation reagent. The cells are lysed to release the biotinylated cell-surface proteins and non-biotinylated intracellular proteins. Finally, streptavidin-coated beads are used to separate the biotinylated cell-surface proteins from the intracellular proteins.
05:16
Assessing the Internalization of Target Surface Proteins Using a Biotin Derivative
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2025
This video demonstrates a method to assess target protein internalization in the mouse cortical astrocytes using biotinylation, followed by cell lysis, streptavidin-based protein extraction, denaturation, and Western blot analysis to confirm successful internalization.
FAQs
Adhesion occurs when exposed proteins bind components of the host extracellular matrix, helping Leptospira remain associated with tissues during infection. This interaction matters because colonization depends on effective contact with host environments, not merely bacterial presence. Studying these binding activities can reveal which protein-mediated interactions support persistence and identify molecular targets for intervention.
Complement modulation can help Leptospira limit the activity of an important host defense system. By influencing complement-related immune activity, surface proteins may contribute to survival in the host and persistence during infection. Examining these interactions connects bacterial surface biology with immune evasion and can clarify why particular proteins are relevant to immunology and infection research.
Structure helps indicate how a surface protein may interact with extracellular-matrix components, host factors, or immune molecules, whereas expression shows when and to what extent that protein is available to perform those functions. Considering both properties provides a more complete view of pathogenesis and helps distinguish promising diagnostic, vaccine, or therapeutic candidates from less suitable targets.
A characterization study can examine the proteins present at the bacterial surface, their structural features, and their expression patterns. It can then relate those observations to adhesion, host-factor binding, complement modulation, and persistence. This integrated approach helps connect molecular properties with infection-related outcomes and provides a basis for selecting proteins for further immunological evaluation.
Their association with Leptospira makes these proteins useful as biomarkers for detecting leptospirosis. A biomarker provides a measurable molecular feature that can indicate infection, while comparing different proteins may help identify candidates with diagnostic value. This application extends surface-protein research beyond pathogenesis by linking bacterial components to improved recognition of disease.
LipL32, OmpL1, and Lig proteins provide examples of surface-associated targets that can be evaluated in studies of protective antibodies, vaccines, or therapeutics. Research can ask whether immune recognition affects infection-related interactions or persistence. In immunology, these investigations help connect antigen selection with the broader goal of preventing or controlling leptospiral disease.